HOT|COOL NO. 1/2018 "Global District Energy Climate Awards"


Some years ago Fortum Tartu identified four areas for district cooling development in the city. The first cooling customer for Fortum Tartu was the Estonian National Museum. Fortum Tartu made a tailor made local cooling and DH solution for this nationally very important building. First DC customers in Tartu downtown were the new shopping centre Kvartal and the hotel Lydia. The third DC plant and network was built for the area in town where southern Estonian’s biggest shopping mall Lõunakeskus lies. The future plan is to connect downtown and Lõunakeskus DC networks. The fourth DC project in one part of the city is also under construction. DC is on the free market and the price depends on the customer and its features.

Investments to new technology and systems have helped to reduce CO2 emissions by almost 40% (from 2008 to 2017). District cooling itself will be environmentally beneficial by reducing CO2 emissions by 52 % (2700 ton/year) compared to the customers own alternative, 71% of decrease will be in primary resources and 70% of decrease in electricity demand.


Both district heating and cooling networks are expected to continue growing. They are one of the main enablers of Tartu’s environmental strategy. Fortum Tartu will continue with the investments to new solutions and technologies to make Tartu an even more green and sustainable place to live.

Today Tartu’s district heating and cooling system is a medium- size system with approximately 80,000 end-users. Tartu’s district heating network supplies around 50 % of the buildings in the city and 75% of its citizens. The main customers are from residential and service sectors. The typical heat consumption (heat for heating and hot water) for old buildings is 150-180 kWh/ m2/y and 80-110 kWh/m2/y for new and renovated buildings (theoretical assumption). The weather conditions in Tartu are quite favorable for district heating: 3894 heating degree days (with reference temperature of 18 °C) and a rather long heating season (7 months). The district heating market in Estonia is regulated by the Competition Authority. Tartu’s district heating price from the beginning of this year is EUR 48.90/MWh (ex. taxes), which is lower than the average national price for district heating (approximately EUR 60/MWh). The main competitors for district heating are individual natural gas boilers and in some cases wood-burning stoves (mainly in one-family houses) or direct electrical heating. The district heating network in Tartu is approx. 175 km long with losses in production being only 10.8%. The heat is produced by 10 production units (mainly CHP and one boiler house; the overall heating capacity is 313 MW) and waste heat from local printing industry Kroonpress, as well waste heat from the district cooling network, which is used to heat up the buildings in Tartu.

For further information please contact:

AS Fortum Tartu Att.: Karita Kivi, +372 5565 8961 Turu 18, 51014 Tartu Estonia

Phone: +372 5565 8961

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